remove extra proxy_pass directive in node nginx conf

automation/roles/nginx/templates/site_node_alias.conf.j2

@@ -12,7 +12,6 @@ server {
 
     location /api {
         proxy_pass http://127.0.0.1:{{ admin_port }}/api;
-        proxy_pass http://127.0.0.1:{{ admin_port }}/;
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
         proxy_set_header X-Real-IP $remote_addr;
         proxy_set_header X-Forwarded-Host {{ server_name }};